Mortising tool



July N, 1933. c. c. URBAN 11,918,067

MORTISING TOOL Filed May 9, 1932 INVENTD Patented July 11, 1 933 CHARLES c. RBAN, or mnlenarorrs, INDIANA MQRT s'zNe root 7 Application filedMay 9,, 1932. Serial No. 610,089. f V

This invention relates to mortising tools and is designed primarily for form ng mor Uses in doors or the like for receiving a lock,

although it will be understoodithat the tool may be used for forming mortises "in many other objects, and one feature of the invention is the provision of means forattaching the tool to the object in which a mortise is to be made.

A further feature of the invention is the provision of means for manually feeding the cutting bit into operative position.

A further feature of the invention is the provision of means for so attaching the cutting bit to the operating lever that the bit may have a slight pivotal action, whereby the cutting edges thereof will readily and positively bite into the wood at the start of the swing of the bit in either direction.

Other objects and advantages will be more fully exemplified in the following specification and claims.

In the accompanying drawing which is made a part of this application,

Figure 1 is a side elevation of the tool as applied to use on the edge of a door, with parts of the tool shown by dotted lines, and,

Figure 2 is an edge elevation of the tool.

Referring to the drawing in which simi lar reference numerals designate correspond ing parts throughout the several views, the numeral 1 designates the body of the tool which is bifurcated to provide a pair of jaws 2, which are to be passed on opposite 7 sides of the object in which a mortise is to be made, in this instance, a door 3.

In order to positively clamp the body of the tool in fixed relation with the object being mortised, apair of elongated clamping plates 4 are provided which normally rest in recesses 5, formed in the inner faces of V the jaws 2 and these plates are clamped against the opposite faces of the door 3, or other object, by means of clamping screws 6.

1 The jaws 2 are also provided with shoullever may be manually fed towards t be extended therethrougli and have swinging action in either direction, the lover 8gbeingjpivoted in'the body 1. by means of a pivot bolt 9, said bolt extending ftran's versely through the body and through an elongated slot 10in the lever 8, whereby the he ob ject to which the tool is attached. 1

Attached to the inner end .of the lever 8 is a cutting bit 11, which may be of any preferred structure, but preferably having a cutting'edge at each extremity thereof, so that a cut will be formed when the lever is swung in either direction. The shank 12 of the cutting bit 11 is slotted as at 13, to re- $3. ceive a shank 14-011 the lever 8 and these parts are secured together by a pivot pin 15 and by slightly spacing the end of the shank 14 from the closed end of the slot 13 and the end of the shank 12 from shoulders 16 on the shank 14, the bit 11 will have a slight rocking or pivoting action. By arranging the'cutting bit 11 in this manner,-

the cutting edges thereof will positively bite into the wood as the lever 8 is swung 5 back and forth on the pivot bolt 9.

The inner ends of the jaws 2 are curved inwardly to meet the side faces of the body 1, thus forming an enlarged cavity '17, through which the shavings removed by the 8!) cutting bit 11 may readily and freely discharge fromthe tool, thus avoiding the pos sibility of choking the tool while in operation. I

It Will likewise be seen that by moving the lever 8 inwardly and outwardly at intervals, the shavings may be quickly removed from the mortise, thus preventing an undue accumulation of shavings within the mortise.

In applyingthe tool to use, a hole (not shown) is bored in the edge of the door, at the top and bottom extremities of the mortise to be formed, when the mortising tool is clamped to the object in alinement with. the holes.

The lever 8 is thenoperated to move the cutting edge of the bit into engagement with the part to be mortised out and the lever then rocked on its pivot for swinging the e cutting bit upwardly and downwardly, a somewhat inward pressure being maintained against the lever 8 for feeding the bit into cutting position until the mortise has been formed to the proper depth.

By imparting a slight rocking or pivoting action to the cutting bit 11, the cutting edges will be sufficiently canted for positively biting into the surface being mortised out, thereby insuring a positive cutas the bit is moved upwardly or downwardly. This manner of mounting the cutting bit insures a positive cut through the part being mortised out without increasing the inward pressure on the lever employed for operating the cutting bit.

WhatIclaimis:

1. In a mortising tool, a hollow body, means for clamping said body to an object, a bit for cutting a mortise, a lever extending through said hollow body to which said bit is attached, means for pivoting the bit to said lever, a pivot for said lever extending through. the walls of said body, said lever having an elongated slot through which said pivot extends, whereby said lever may be manually moved inwardly for consecutively engaging said bit with the surface to be mortised concurrently with rocking the same on its pivot and means forming discharge cavities for thecuttings from the bit.

2. In a mortising tool, a hollow body including clamping jaws, a lever passing through said body, a cutting bit on the inner end of said lever, a pivot pin for said lever, said lever having an elongated slot through which said pivot pin extends, whereby said lever may be moved longitudinally inwardly for engaging the bit with the surface to be removed and outwardlyfor removing shavings from the mortise, said jaws, at their intersection with said hollow body, being shaped to form an enlarged cavity for the discharge of the shavings from the mortise.

In testimony whereof I hereto-jafiix my signature. I 7

CHARLES C URBAN. 

